Heating-furnace.



PATENTED DEC. 3, 190'7 F. B. SWIFT. "HEATING FURNACE.

APPLIOATIOH FILED JUNE 3,1907.

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PATENTED DEC. s, 1997.

F. ,B- SWIFT. HEATING FURNACE. APPLIOATION rIL'm) JUNE 3,1907.

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FRANCIS E. SWIFT, OF DAYTON, OHIO.

HEATING-FURNACE.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed June 3. 1907. Serial No. 376.996

To all whom it may concern:

Be it known that I, FRANoIs E. SWIFT, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Heating- Furnaces 3 and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to heating furnaces, and more particularly to the shape of the interior of the fire-box of the same, whereby it is peculiarly adapted for house heating purposes, and has for its object to provide a device of this kind in which a coking table or bench can be used in any desired position therein relatively to the live fire pockets, either in front, behind, on the sides or above the same, and with or without grates, but more particularly to locating said table between two fires.

In the accompanying drawings, which illustrate the invention, Figure 1 is a front elevation of a furnace embodying my invention; Fig. 2 is a vertical, sectional view taken directly at the rear of the front of the furnace; Fig. 3 is a vertical, longitudinal sectional view; Fig. 4 is a horizontal, sectional view looking downward; and Fig. 5 is a detail view of a pair of grate bars.

Referring more particularly to the drawings, 1 indicates the main frame or shell of the furnace, which constitutes the fire-box and may be built of cast or sheet iron, or

artly brick, and in some cases it may be lined with fire clay slab where the iron will not stand such hard firing as that to which it may be subjected.

Suitably located within the furnace are the fire pockets 2, two being shown, one near each side and are preferably provided with suitable grate bars 3. The forward ends of the ash pit 4, under the fire floors, as the bars 3, are closed by suitable doors 5, one or both of which is provided preferably with an auxiliary door, 6, which can be utilized as a damper for controlling the draft. A smaller door 7, is located at the forward ends of the fire floors and preferably extends a few inches above the same, and a few inches below it, according to the size of the furnace.

Located between the fire pockets, and

preferably above the same, as shown in the drawings, is a coking table 8, which extends from a door 9, in the front of the furnace to a back wall 10, which is preferably formed from a slab of fire clay. Located preferably directly to the rear of the back wall 10, is a smoke outlet 11, through which the products of combustion from the fire pockets are permitted to escape.

Where the portion of the furnace directly below the coking table is hollow, as in the present instance, a partition 12, projects forward from an inclined galvanized iron covering or jacket 13, at the rear substantially to the front end of .the furnace, but at a slight distance at its edges from the side walls of the fire pockets, and in front whereby a space, 14:, is left upon each edge and in front of the partition for the passage of cold air that is permitted to enter the furnace. The cold air' preferably enters from underneath the furnace and in the rear, as shown in Fig. 3, and after passing up above the partition, it becomes thoroughly heated and passing up in front of and around the upper part of the furnace it enters hot air pipes 15, by means of which it is conducted to any place that it is desired to have heated.

Where grates are used in the fire ockets,

they are preferably constructed as s own in- Fig. 5, in which one of the bars is stationary and the other bar is slidably mounted and has its forward end provided with an extension, 16, which projects toward the front wall of the furnace and is provided with an 0 ening 17, which is adapted to be engaged y a hook 17 on a lever 18. The movable bar 16 can be moved so that its openings will be out of register with the stationary bar, thus virtually making a closed bottom, or it can be moved in the opposite direction, so that a space of any desired size may be formed. When the grate is used as above described, the back draft can be taken from the ash it through the back end of the bars, or if a so id bottom is used or formed by the grate bars, the draft can be taken through an inlet below the bottom of the fire hole.

In building or constructing a furnace embodying my invention, as above described, the walls can be formed of any desired thickness, and the coking tablemay be built solid of any thickness to suit circumstances, or it can be formed hollow and used for radiating surfaces for hot air purposes and it may be of any shape as narrow and long, or more nearly rectangular, and can be used with or without grate bars.

A furnace constructed in' this manner will burn any kind of fuel, as wood, coal, soft or anthracite, even the cheaper kinds of soft slack coal, without danger of the flues clogging or choking up from soot, etc., as all such material is consumed, and the amount of radiating surface that is secured for the size of the furnace is very large. It Will hold fire for a long time, and can be filled with fine slack coal and will not accumulate so much gas at once as will cause 1t to dpl ufl or explode, as frequently happens. The aft is very great andit does not require a good chimney to cause it to work well.

The hot air chamber formed by the additlonal covering 19 may be used if desired for hot water or steam, and from which it may be led off by the pipes 15'to suitable radiators n a manner similar to that in which hot air is conveyed through said ipes.

I-Iaving thus described my invention, I claim:

1. In a furnace for house heating purposes,

a shell provided with fire ockets, a hollow coking table, a partition be ow said'table and between the fire'pockets.

'2. Ina furnace for house heating purposes, a shell provided with fire pockets, a hollow coking table, a partition between the walls of said table and at a distance therefrom at its edges.

3. In a furnace for house heating purposes, a shell provided with fire pockets, a cokingtable, a partition below said table and between sa1d fire pockets, and means for passing the draft up through the grates, into said fire pockets.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANCIS E. SWIFT. 

